Comparison of single plane and biplane radionuclide ventriculograms performed in oblique projections in patients with acute myocardial infarction.

Abstract

summARY Thirty-five patients were studied by first pass radionuclide ventriculography in both right anterior oblique and left anterior oblique projections, after an acute myocardial infarction. Left ventricular ejection fraction was measured in both obliques from the background corrected time-activity curves and the values correlated closely. Mean left ventricular ejection fraction from the two obliques correlated well with that measured from the ventricular perimeters using a biplane area-length formula. End-diastolic volume from the single plane right anterior oblique correlated with that measured using the biplane formula. Combined right and left anterior oblique projections allowed identification of akinetic sites in all patients, whereas the right anterior oblique alone failed to delineate akinetic sites in 1/10 (10%) of patients with anterior infarction, 2/9 (22%) with inferior infarction, and 6/16 (37%) with multiple areas ofinfarction. The